JPH03108204A - Conductive composition - Google Patents
Conductive compositionInfo
- Publication number
- JPH03108204A JPH03108204A JP24477389A JP24477389A JPH03108204A JP H03108204 A JPH03108204 A JP H03108204A JP 24477389 A JP24477389 A JP 24477389A JP 24477389 A JP24477389 A JP 24477389A JP H03108204 A JPH03108204 A JP H03108204A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- weight
- conductive
- conductive composition
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims abstract description 9
- 239000005060 rubber Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000004898 kneading Methods 0.000 abstract description 5
- 229910052736 halogen Inorganic materials 0.000 abstract description 3
- 150000002367 halogens Chemical class 0.000 abstract description 3
- 238000004132 cross linking Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009408 flooring Methods 0.000 description 2
- 239000003273 ketjen black Substances 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ゴムをベース材料としてなる導電性組成物に
関し、とくに加工性に優れ、精密電子素子用施設などに
おける帯電防止床材等の如きシート状に容易に加工する
ことができ、しかも高い導電性を保有してなる新規な導
電性組成物に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a conductive composition made of rubber as a base material, which has particularly excellent processability and is suitable for use as antistatic flooring materials in facilities for precision electronic devices, etc. The present invention relates to a novel conductive composition that can be easily processed into a sheet and has high conductivity.
［従来の技術］
静電気によるごみの付着や半導体破壊などの問題を生じ
易いＩＣ工場や電子部品組立工場などにおいては、静電
気による帯電を防止するために、床面上に電気抵抗の小
さい導電性シートを敷きつめ、作業者を接地し得るよう
に配慮しているのが通常である。[Prior Art] In IC factories and electronic component assembly factories, where problems such as dust adhesion and semiconductor destruction due to static electricity are likely to occur, conductive sheets with low electrical resistance are placed on the floor to prevent static electricity from forming. It is common practice to lay the ground all over the ground so that workers can be grounded.
この場合の導電性シートの体積抵抗率は小さい程望まし
く、例えば床材が１ｘｉｏ”Ω程度の電気抵抗を有する
場合、静電気は数百ボルトのオーダーで人体に蓄積する
のに対し、その抵抗が半分になると１０ボルト前後にま
で低下すると考えられている。このような静電気による
半導体素子等への影響は当然考えられることであり、最
近素子の高集積化あるいは高密度実装化が加速度的に進
展されつつある折柄、上記導電性シートの体積抵抗率を
できる限り小さくすることへの要望は益々高まりつつあ
る。In this case, the smaller the volume resistivity of the conductive sheet, the more desirable it is.For example, if the flooring material has an electrical resistance of about 1xio''Ω, static electricity accumulates in the human body on the order of several hundred volts, but the resistance is half that. It is thought that the voltage will drop to around 10 volts when the voltage drops to about 10 volts.The impact of such static electricity on semiconductor devices is naturally conceivable. In recent years, there has been an increasing demand for reducing the volume resistivity of the conductive sheet as much as possible.
従来の上記導電性シートは、ゴムあるいはプラスチック
をベース材料とし、これらに金属粉、グラファイト粉、
導電性カーボンブラックまたは電解質のような導電性物
質を多量に配合して！Ｖ造していた。そして、これら導
電性物質の中で特性および経済的見地から、工業的には
主として高度の導電性を有するカーボンブラックすなわ
ちアセチレンブラックやケッチェンブラック等を添加し
て製造していた。The conventional conductive sheet mentioned above uses rubber or plastic as a base material, and adds metal powder, graphite powder,
Contain a large amount of conductive substances such as conductive carbon black or electrolyte! It was built as a V. Among these conductive substances, carbon black having a high degree of conductivity, such as acetylene black and Ketjen black, has been mainly added to manufacture industrially from the viewpoint of characteristics and economy.
［発明が解決しようとする課題］
上述したように、最近は、導電性シートの体積抵抗率を
できる限り小さくすることが要望されるようになり、１
Ω−■以下といった高導電性を保有していることが必要
条件とされるようになった。[Problems to be Solved by the Invention] As mentioned above, there has recently been a demand for reducing the volume resistivity of conductive sheets as much as possible.
It has become necessary to have high conductivity of Ω-■ or less.
しかし、体積抵抗率が１Ω−■以下の高度の導電性を得
るためには、非常に多量の導電性物質を添加することが
必要となり、その結果、材料の粘度が大ｒｔｊに上昇し
、混練時、押出時あるいはカレンダーロールによるシー
テイング時等における加工性が著しく損なわれるという
問題が生ずるようになった。However, in order to obtain a high degree of conductivity with a volume resistivity of 1Ω-■ or less, it is necessary to add a very large amount of conductive substance, and as a result, the viscosity of the material increases to a large rtj, and the kneading A problem has arisen in that processability during extrusion or sheeting with calender rolls is significantly impaired.
加えるに、製造した材料の機械的特性、例えば引張特性
が大ｒｔ１に低下するといった派生的欠点も生ずるよう
になり、実用上において問題化されている。In addition, the mechanical properties of the produced materials, such as tensile properties, are reduced to a large degree rt1, which is a problem in practical use.
本発明の目的は、上記した従来技術の問題点を解消し、
混練、押出、あるいはシートへの加工が容易であり、し
かも極めて高い導電性を保有している新規な導電性組成
物を提供しようとするものである。The purpose of the present invention is to solve the problems of the prior art described above,
The object of the present invention is to provide a novel electrically conductive composition that is easy to knead, extrude, or process into sheets, and has extremely high electrical conductivity.
［課題を解決するための手段］
本発明は、ハロゲンを含まないゴム１００重量部にケッ
チェンブラックＥＣ２０〜７０重量部と薄片化黒鉛３０
〜１５０重量部を添加してなることを特徴とするもので
ある。[Means for Solving the Problems] The present invention includes 100 parts by weight of halogen-free rubber, 20 to 70 parts by weight of Ketjenblack EC, and 30 parts by weight of exfoliated graphite.
It is characterized by adding ~150 parts by weight.
ハロゲンを含まないゴムとしては天然ゴム、スチレン・
ブタジェンゴム、ブタジェンゴム、シンジオタクチック
１．２ポリブタジエン、イソプレンゴム、アクリロニト
リル・ブタジェンゴム、エチレン・プロピレンゴム、エ
チル・プロピレン・ジェンターポリマ、ブチルゴム、ア
クリルゴム、シリコーンゴム、多硫化ゴム等が挙げられ
る。Rubbers that do not contain halogens include natural rubber, styrene,
Examples include butadiene rubber, butadiene rubber, syndiotactic 1.2 polybutadiene, isoprene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, ethyl-propylene-genter polymer, butyl rubber, acrylic rubber, silicone rubber, polysulfide rubber, and the like.
ケッチェンブラックＥＣとしては、市販品（例えばオラ
ンダのアクゾ社製あるいはライオン株式会社製等）があ
る、この添加量を２０〜７０重量部とするのは２０重量
部以下では十分な導電性が得られず、７０重量部以上で
は粘性が高くなり、加工が困難になるためである。Ketjenblack EC is commercially available (for example, manufactured by Akzo of the Netherlands or Lion Corporation).The amount added should be 20 to 70 parts by weight, as sufficient conductivity cannot be achieved with less than 20 parts by weight. If the amount exceeds 70 parts by weight, the viscosity becomes high and processing becomes difficult.
また、薄片化グラファイトは酸処理黒鉛を高温で熱処理
し゛、層間の酸を急激に気化させることにより揮散させ
、同時１こ層間を膨張させた膨張化黒鉛を解砕させて製
造するものである。市販品としては、日本黒鉛工業（株
）のＥＸＰ−Ｐ、ＢＰの２種類のグレードがある。その
添加量を３０〜１５０重量部としたのは３０重量部以下
では十分な導電性が得られず、１５０重量部以上では粘
性が高くなりシート状に加工することが困難となるため
である。Furthermore, exfoliated graphite is produced by heat-treating acid-treated graphite at a high temperature, rapidly vaporizing and volatilizing the acid between the layers, and simultaneously crushing the expanded graphite that has expanded the interlayers. As commercially available products, there are two grades, EXP-P and BP, manufactured by Nippon Graphite Industries Co., Ltd. The amount added is set to 30 to 150 parts by weight because if it is less than 30 parts by weight, sufficient conductivity cannot be obtained, and if it is more than 150 parts by weight, the viscosity becomes high and it becomes difficult to process it into a sheet shape.
本発明においては、上記配合剤に加えて、酸化防止剤、
滑剤、充填剤等が添加されても差支えない。In the present invention, in addition to the above compounding agents, antioxidants,
There is no problem even if lubricants, fillers, etc. are added.
本発明の組成物を架橋する方法としては、イオウ系加硫
剤による方法が一般的であるが、用途によっては有機過
酸化物による架橋、電子線照射による架橋およびシラン
グラフト水架橋等による方法も選ぶことができる。有機
過酸化物による架橋に用いる架橋剤としては、ジクミル
パーオキサイド、３−ビス（ｔ−ブチルパーオキシイソ
プロピル）ベンゼン等が好適である。また、電子線照射
による架橋における架橋助剤としては、トリメチロール
プロパントリメリテート、トリアリルイソシアヌレート
等の反応性モノマが一般的に使用される。As a method for crosslinking the composition of the present invention, a method using a sulfur-based vulcanizing agent is generally used, but depending on the application, methods such as crosslinking using an organic peroxide, crosslinking using electron beam irradiation, and silane graft water crosslinking may also be used. You can choose. As the crosslinking agent used for crosslinking with an organic peroxide, dicumyl peroxide, 3-bis(t-butylperoxyisopropyl)benzene, etc. are suitable. In addition, as a crosslinking aid in crosslinking by electron beam irradiation, reactive monomers such as trimethylolpropane trimellitate and triallyl isocyanurate are generally used.
［実施例］ 以下に、本発明について実施例を参照し説明する。[Example] The present invention will be described below with reference to Examples.
第１表に示す配合割合に従って各種成分を配合し、約８
０℃に保持された６インチロールに投入してロール混練
を行なった。混練後スチーム加熱プレスにより１６０℃
×１０分の条件で加硫を行ない１ｍ＋厚のシートを得た
。Mix various ingredients according to the proportions shown in Table 1, and make approximately 8.
The mixture was put into a 6-inch roll maintained at 0°C and kneaded by roll. After kneading, heat the mixture to 160°C using a steam heating press.
Vulcanization was performed under the conditions of x10 minutes to obtain a sheet with a thickness of 1 m+.
各側の評価結果を第１表の下欄に示す、尚、評価方法は
次の通りである。The evaluation results for each side are shown in the lower column of Table 1, and the evaluation method is as follows.
加工性二 ロール混練時における外観と、モータの負荷
によって測定しな、モータの
負荷についてはＩＯＡ以下の場合をも
って良とした。Workability 2: Measured by the appearance during roll kneading and the motor load.If the motor load was less than IOA, it was considered good.
電気特性二 図に示すように、２０ｘｌ ０Ｏｘｌ關の
試料１の両端１０１ＩＩＩＩにシルバーペイント２．２
を塗布し、１日放置後ホ
イートストンブリッジ法により抵抗
（Ｒ）を測定し次式により体積抵抗率
（ρ）を計算した。Electrical characteristics 2 As shown in the figure, silver paint 2.2 on both ends 101III of sample 1 of 20xl 0xl
was applied, and after being left for one day, the resistance (R) was measured by the Wheatstone bridge method, and the volume resistivity (ρ) was calculated using the following formula.
第１表からも明らかな通り、実施例１〜４はいずれもロ
ール加工性に優れ、体積抵抗率も１Ω−■以下と高導電
性を示している。As is clear from Table 1, Examples 1 to 4 all have excellent roll processability, and exhibit high electrical conductivity with a volume resistivity of 1Ω-■ or less.
これに対し、ケッチェンブラックＥＣあるいは薄片化グ
ラファイトのみを単独で添加した比較例１．２はそれぞ
れロール加工性、体積抵抗率の点で劣っている。また、
ケッチェンブラックＥＣ及び薄片化グラファイトの添加
量が少ない比較例３では、比較例２と同様にロール加工
性は良いものの、体積抵抗率が高いことがわかる。さら
に薄片化グラファイトに代えてケッチェンブラックとア
セチレンブラックとを併用した比較例４は優れた導電性
を示すもののロール加工性の点で劣っている。On the other hand, Comparative Examples 1 and 2, in which only Ketjen Black EC or exfoliated graphite was added alone, were inferior in terms of roll workability and volume resistivity. Also,
It can be seen that in Comparative Example 3, in which the added amounts of Ketjenblack EC and exfoliated graphite are small, the roll processability is good, as in Comparative Example 2, but the volume resistivity is high. Furthermore, Comparative Example 4 in which Ketjen black and acetylene black were used in combination in place of exfoliated graphite showed excellent conductivity, but was inferior in terms of roll processability.
以上の結果から、ケッチェンブラックＥＣと薄片化グラ
ファイトを本発明に係る配合範囲において組合せること
が、１１械的及び電気的特性並びに加工性の改善の上に
おいて最善であり、導電性シート等に加工して卓効を奏
し得る材料を入手できることが、これによってよくわか
る。From the above results, the combination of Ketjenblack EC and exfoliated graphite within the blending range according to the present invention is the best in improving mechanical and electrical properties and processability, and is suitable for use in conductive sheets, etc. This clearly shows that materials are available that can be processed to great effect.
［発明の効果］
以上の通り、本発明に係る組成物によれば、高い導電性
を保持しつつ加工性と機械的強度を向上させた導電性組
成物を提供することができ、斯業界における今日的要請
に適切に応え得るものであり、その工業上の価値は非常
に大きなものがある。[Effects of the Invention] As described above, according to the composition of the present invention, it is possible to provide a conductive composition that maintains high conductivity and has improved workability and mechanical strength, and is one of the most popular in the industry. It can appropriately meet modern demands and has great industrial value.
図は供試材の体積抵抗率を測定する状況を示す説明図で
ある。
ｌ：供試試料、
２ニジルバーペイント。The figure is an explanatory diagram showing a situation in which the volume resistivity of a sample material is measured. l: Test sample, 2 Nisilver paint.
Claims (1)
ンブラックＥＣ２０〜７０重量部と薄片化黒鉛３０〜１
５０重量部を添加してなることを特徴とする導電性組成
物。(1) 100 parts by weight of halogen-free rubber, 20 to 70 parts by weight of Ketjen Black EC and 30 to 1 part by weight of exfoliated graphite
A conductive composition characterized in that it contains 50 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24477389A JPH03108204A (en) | 1989-09-20 | 1989-09-20 | Conductive composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24477389A JPH03108204A (en) | 1989-09-20 | 1989-09-20 | Conductive composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03108204A true JPH03108204A (en) | 1991-05-08 |
Family
ID=17123701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24477389A Pending JPH03108204A (en) | 1989-09-20 | 1989-09-20 | Conductive composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03108204A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06168754A (en) * | 1992-11-30 | 1994-06-14 | Daini Shinano Polymer Kk | Elastic connector |
-
1989
- 1989-09-20 JP JP24477389A patent/JPH03108204A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06168754A (en) * | 1992-11-30 | 1994-06-14 | Daini Shinano Polymer Kk | Elastic connector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4412938A (en) | Semiconducting resin compositions | |
| JP6246204B2 (en) | Flame retardant polymer composition | |
| EP2223309A1 (en) | Electric article comprising at least one element made from a semiconductive polymeric material and semiconductive polymeric composition | |
| Pramanik et al. | Effect of extensional strain on the resistivity of electrically conductive nitrile-rubber composites filled with carbon filler | |
| CN109503959A (en) | A kind of high-hardness, wearable ethylene propylene diene rubber and preparation method thereof | |
| JP5312893B2 (en) | Peroxide crosslinking rubber composition containing expandable graphite and method for crosslinking the peroxide | |
| CN105802247B (en) | A kind of weatherability cable insulation material and preparation method thereof | |
| JPH03108204A (en) | Conductive composition | |
| JPH03149708A (en) | Conductive composition | |
| JPS6090235A (en) | Electrically conductive chloroprene rubber composition | |
| JPH03149707A (en) | Conductive composition | |
| KR102575263B1 (en) | Highly insulating vulcanized rubber composition, footwear article thereof and manufacturing mehtod thereof | |
| JPH04159342A (en) | Conductive composition | |
| JP2877710B2 (en) | Semiconductive rubber material | |
| JPH0334497B2 (en) | ||
| JP3442492B2 (en) | Semiconductive rubber composition | |
| RU2078102C1 (en) | Method of composition material producing | |
| JPS61185548A (en) | Rubber composition for vulcanized bladder | |
| JPH0827300A (en) | Electrically conductive foamed rubber and its production | |
| JPS61133247A (en) | Electrically-conductive elastomer comprising scaly graphite as component | |
| JP2754154B2 (en) | Conductive rubber roll | |
| JP4673005B2 (en) | Semiconductive composition | |
| EP0289193A1 (en) | Pressure responsive electrically conductive materials | |
| CN115785578A (en) | Rubber for damping spacer and preparation method and application thereof | |
| SU1758046A1 (en) | Composition for producing ebonite |